"Spirillum" refers to a type of bacteria that is spiral-shaped and often free-moving. They are found in various habitats, including water and soil, and some can be harmful to humans while others are beneficial in the environment by aiding in nutrient cycling.
Bacillius, Spirillius and Cocci.
Tetanus is caused by a bacterial toxin produced by Clostridium tetani bacteria, not a virus. The bacteria spores can enter the body through cuts or puncture wounds, where they produce toxins that affect the nervous system. It is not a latent virus because it does not become dormant within the body.